1. Identify the functional group or molecule for each of the following. (3 points) 1. COOH -OH 2. COH -OH 3. COH -OH 1. List whether each of the following substances was positive or negative for reducing sugar, as indicated by the Benedict's test. (6 points) 1. corn syrup (1 point) positive 2. table sugar (1 point) positive 3. unknown 1 (1 point) negative 4. unknown 2 (1 point) negative 5. unknown 3 (1 point) positive 6. unknown 4 (1 point) positive 1. List whether each of the following substances was positive or negative for starch, as indicated by using iodine. (7 points) 1. onion juice (1 point) positive 2. water (1 point) negative 3. cornstarch (1 …show more content…
lemon juice (1 point) pH 2 4. distilled water (1 point) pH 7 5. baking soda (1 point) pH 8
1. What was the purpose of using water as a sample in some of the tests performed in the lab? (2 points) to have a control. 2. Four unknown samples were included in the lab kit: flax seed meal, potato starch, egg whites, and dried milk. Using the results of the biochemical testing, determine which number corresponds to the correct unknown. (8 points) 1. unknown 1 (2 points) egg whites 2. unknown 2 (2 points) dried milk 3. unknown 3 (2 points) flax seed meal 4. unknown 4 (2 points) potato starch 1. State a commercial use for biochemical testing as performed in this online laboratory. (5 points) face wash! To be able to test what different ingredients within the facial cleanser and how they will effect the areas, and chemicals of the skin composition. 2. Describe the three different types of bonds, providing examples of molecules formed through each type of bond. (3 points) Covalent bond, methane. Ionic bond, table salt. Hydrogen bond, water. 3. What is the difference between a monosaccharide, disaccharide, and a polysaccharide? (3 points) A monosaccharide is a carbohydrate that doesn’t hydrolize. A disaccharide is a group of that yield monosaccharides on hydrolosis. Lastly, polysaccharide is a carbohydrate that contains more than three monosaccharide units per molecule. 4. State three factors
Our results showed mainly sugar, oil, and starch in the happy meal. I observed the color changed in all the tests, but the protein test. My hypothesis was “I predict the McMush will have all the biomolecules
4) I cannot answer this question with the information presented, but it should be pretty straightforward to say which foods
7)a) You would do the Benedict’s reagent test for simple sugars and the Lugol’s solution or Iodine test for polysaccharides and starch. To test the lipids you would use the Sudan iV test and Biurets reagent test for protein.
Analysis: In this experiment, every substance tested positive for at least 1 organic compound. Corn oil tested positive for lipids. Honey and oats tested positive for starch. Honey, apple juice, and unknown 1 tested positive for sugar. Egg white, gelatin, and unknown 2 all tested positive for proteins. So, not a single substance didn't test positive for at least 1 organic compound. All the indicators used in this experiment change color when in the presence of a compound; therefore, they chemically react with the compound. No errors were made during this experiment
a) What is meant by “sugar”? What is a “carbohydrate”? How are sugars and carbohydrates related?
2.List whether each of the following substances was positive or negative for reducing sugar, as indicated by the Benedict's test. (6 points)
Before the food lab experiment where we tested milk, crackers, bananas, and egg whites for simple sugars, starch, and proteins I expected to learn about what foods contained any of the three possibilities, if not all of them. The lab provided my group and I information afterwards that can further my education into macromolecules and biology as a whole subject. My group and I predicted that milk will contain simple sugars, crackers will have simple sugars and starch, bananas will have proteins, and the egg whites will contain proteins. If milk does contain simple sugars, during this lab when my group and I test, then the milk should turn from a blue color to a green, yellow, orange, or red color when heated. Crackers should have the same outcome as milk if it does contain simple sugars, but if crackers also have starch the crackers should then turn into a blackish color. We predicted that bananas contain protein and if so, then the solution should turn from a light blue to either a dark blue or a purple. Finally, egg whites are what my group and I finally predicted to contain proteins. If our hypothesis is correct, the solution should do the same as it does for the bananas.
Hypothesis- If I test unknown 4 then I will find that its properties to be like that of sugar.
In the search for new biofuels, research has been done into the digestion of wood waste by fungi.
The purpose of this experiment was to see the last place where the murder victim went to. The objective of this is to see if his contents contain the very following lipids, proteins, carbohydrates-glucose, and carbohydrates-starch. When testing for lipids it tested negative. The paper bag was not translucent to show that they were any signs of lipids. When testing for carbohydrates-glucose. The heated Benedict compound was still blue meaning there was no signs of there being glucose. This might have happened because something went wrong while testing like for example, all of the foods suppose to have lipids when the group tested negative for lipids. There must have been a low amount of polysaccharides and fatty acids that they could not be
Specific tests can be conducted to determine the presence of certain nutrients in our food.Fill in the blanks in the table below, using the words provided in the word bank below.
Step 1 and 2 was repeated by using distilled water by replacing the test solution.
Thus, the above symbols denote, respectively, the mass-235 and mass-238 isotopes of uranium (symbol U), and the mass-1,-2,and -3 isotopes of hydrogen (symbol H). The mass-2 isotope of hydrogen is also called deuterium and the mass-3 isotope is also called tritium.
Purpose the purpose of this experiment was to perform test to detect the presence of carbohydrates, proteins, lipids, and nucleic acids. Explain the importance of a positive and a negative control in biochemical test. Use biochemical test to identify an unknown compound.